If you have been attempting to update Train Simulator or Train Sim World and receive a "Content File Locked" error, please follow these instructions to remedy the situation:

Close down Steam completely by selecting Exit from the Steam Menu.

Open an elevated command prompt. To do this, do the following as appropriate:

If you’re using Windows 8 or 8.1

Swipe in from the right edge of the screen, and then tap Search. Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search. Type Command Prompt in the Search box, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.

If you’re using Windows 10 or Windows 7

Click Start, type Command Prompt or cmd in the Search box, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.

At the command prompt, type the following command, and then press ENTER twice:

netsh winsock reset

Click Start and then Restart to restart your computer. You should now be able to update Train Simulator or Train Sim World as normal.